Members of the UX group belong to the following orgs and read the following lists:

Nicole

• formerly on ASIST, but taking a break this year (2010)
• email lists I usually read:
  • NEASIS-L
  • Anthrolib
  • Lynda.com newsletter
  • free culture at MIT
  • MIT's webpub
  • Mac Partners at MIT
  • Mobile partners at MIT
  • IT Partners at MIT (thinking of getting off this one)
  • IST security newsletter (MIT)
  • UPA Boston (usability professionals association)
• email lists I filter and read infrequently: 
  • Woo Themes newsletter (wordpress themes we pay for)
  • Slideshow Pro newsletter
  • Jakob Nielsen's Alertbox
  • Jared Spool's UIE Tips 
  • Mark Hurst's Good Experience
  • Current Cites
  • Internet Scout Report
  • Cooper Jounal
  • Adaptive Path - AP Experience Now
  • Change This
  • NGC4lib
  • LibraryThing's newsletters
  • code4lib
  • Google Librarian newsletter
  • Berkman Buzz (at Harvard)
  • Tidbits (Mac news)

I also read LOADS of RSS feeds, too many to list here.

Darcy

Professional orgs:

• ASIST
• ASEE/ELD (not active member, but still on email list)

Email lists (besides above orgs)

• webpub@mit.edu (MIT Web Pub)

Lisa H.

Professional orgs:

• RUSA (reference focus)
• LLAMA (management focus) – currently on Using Assessment ... very long name Committee
• ACRL New England

Email lists (besides above orgs)

• AnthroLIB
• ARL assessment list
• BLC Community of Interest on Assessment
• Crosstalk (MIT talks on various technology topics)
• Dig_ref
• Library link of the day – one link each day of interest in all aspects of libraries
• LITA-L – ALA's technology divisions email list. I don't belong to the division right now